Automatic means of cleaning the sediment out of hot water heating circuits



Sept. 25, 1934. c. A. JOHNSON AUTOMATIC MEANS OF CLEANING THE SEDIMENT OUT OF HOT WATER HEATING CIRCUITS Filed Oct. 7, 1953 2 Sheets-Sheet 1 INVENTOR p 1934- c. A. JOHNSON 1,974,816

AUTOMATIC MEANS OF CLEANING THE SEDIMENT OUT OF HOT WATER HEATING CIRCUITS Filed Oct. 7, 1933 2 Sheets-Sheet 2 H0r t? 601. 0

f y 4 INVENTOR Patented Sept. 25, 1934 UNITED STATES AUTOMATIC MEANS OF CLEANING THE SEDIMENT OUT OF HOT WATER HEATING CIRCUITS Charles A. Johnson, Indianapolis, Ind.

Application October 7, 1933, Serial No. 692,663

3 Claims.

This invention relates to an automatic system for cleaning sediment out of pipes and heating units in hot water heating systems.

In the accompanying drawings,

Figure 1 is an elevational view showing the device connected with a furnace coil and heating tank.

Figure 2 is a longitudinal central sectional view through a suction T.

Figure 3 is a side elevation and Figure 4 a fragmentary elevation showing the device connected with a gas heated coil.

Referring to the drawings, D indicates an ordinary hot water tank, to which is connected by means of pipes, a heating section C, arranged in any suitable manner, as shown in Figs. 2 and 3, the section of the pipe connecting with the lower end of the section C having a suction T B, which is in turn provided with service ports e and a siphoning port ee, the siphoning port end ee having a nozzle like member e1, the free end of which projects beyond the vertically extending service port e. The hot water pipe connecting with the siphoning port ee is provided with one or more valves or faucets A, through which, when opened, hot water may be drawn from the tank D.

In the vast majority of cases the supplying of hot water for domestic purposes is done by a water supplied tank D, a heating section 0, attached thereto in circulating connection and a gas supplying burner or furnace. When the gas is lit or a fire is built in the furnace, the water in the heated section will rise to the top of the tank D and when cooled, return through the bottom connection to the heating section C, but this connection is slow and sluggish and has no tendency to clean the heating section.

As soon as the impurities in the water come in contact with the heated metal, a film attaches to the inside of the inside heating surface, gradually increasing until the heated section becomes filled with sediment and becomes useless for water heating purposes.

To remedy this condition, I propose, in connection with awater supplied tank D, a heater C and circulating connections therethrough and between to incorporate a three-way suction T B, -(see Fig. 1) in one of these connections in the heating circuit, placed as shown in Figs. 2 and 3, the T having two service ports e, thus providing free circulation of water between tank D and the heating section 0. The siphon port cc of the suction T B is extended to and connected with the hot water system with appropriate means for withdrawing water therefrom. When valve A is opened in the hot water line, a counter flow is set up with the full force of the water pressure through the heater section C and the suction T B (see Figs. 2 and 3), the speed or force of the water being further accelerated by the siphonic action of the suction T B, thus automatically keeping the heating sectionfree from the accumulations of sediments and enabling them to maintain normal efiiciency.

The suction T B may be placed in different positions as in Fig. 4 and still serve the same purpose. The opening ee then becomes the suction port and the two service ports e will register.

I do not confine myself to any particular shape of the suction T B, but may use any appliance that will produce in the heating circuit, the siphonic action necessary to produce such speed of the water as will eliminate the sediments in the heating elements.

I reserve the right to make such changes and variations as may not be inconsistent with the appended claims.

What I claim is:

1. The combination with a domestic hot water heating system comprising a tank, a heater and,

connections between the heater and tank arranged for thermosiphonic circulation between the heater and tank, a connection from the lowermost of said connections for delivering water to points of use, and cold water supply means for the tank separate from any of said connections, of a means for reversing said circulation through the heater when hot water is being drawn from the system, said means including an ejector device placed at the junction point of said lowermost connectionand said connection for delivering water for use.

2. The organization described in claim 1 in which the ejector device comprises a T connection having a nozzle member formed therein, the lowermost circulating connection being connected to the lateral opening of the T and one of the other openings, and the nozzle and said connection for delivering water for use being connected to the other opening of the T.

3. In combination with a heater or coil, a closed water supply tank, an ejector incorporated between said heater and tank having openings, with one opening connected to the heater and one opening connected to the tank with a free and open thermo-siphonic circulation thru the tank and heater, the other opening connected to the hot water supply system, said ejector having a nozzle projected in reverse to the normal circulation, so that when water is drawn from the hot water supply system the hot water circulation will be reversed and the hot water drawn from the upper part of the tank through the heater or coil and discharged thru the openings for use in the hot water system, whereby the force of the water will eliminate sediments and corrosions in the heating elements.

CHARLES A. JOHNSON. 

